Communicator 2007 R2 fails to open new window when double-clicking a Contact

When using Microsoft Office Communicator 2007 R2, double-clicking a Contact fails to launch a new conversation window.However, you are still able to right-click a Contact, and start an IM session by selecting “Send an Instant Message.”

Cause:

When double-clicking a Contact, OC 2007 R2 uses XML to initialize a new conversation window, and we’re finding several customers who have incompatible and/or legacy builds of MSXML.DLL that are encountering these failures.

having the same issue, except when i right click and select "send an instant message" i still cannot send a message. also, when i receive a message, i see notification in lower right hand corner, but cannot open a text box to view or reply to the message. i've updated, reinstalled, installed msxml 6.0 and 3.0 sp7, nothing. only happens on one computer but happens in different accounts on that pc.

Indeed, it appears to be specific to that particular machine. If you'd like assistance with troubleshooting/debugging it, you should engage our Unified Communications Support Team (see http://support.microsoft.com). However, if it's quicker / more efficient to simply wipe the machine, and reload the OS + applications from scratch, I'm not going to argue with that approach. 🙂

When I'm using Microsoft Office Communicator 2007 R2, double-clicking a Contact fails to launch a new conversation window. I am able to right-click a Contact, and select “Send an Instant Message" but I have the same situation (fails to launch a conv. window). It happens for all my contact and its a local problem, it work's for another computer from the network. Windows XP soft.

I encounter the same problem as @nsquid. I also has a symptom that IE cannot open website, instead, IE will prompt me to download the site as text file. Our IS tells me to reinstall IE, and my problem is gone now. Post here in case other people want a solution.